<?php
$n = intval(readline());
$sumLeft = 0.0;
$sumRight = 0.0;
 for($i = 1; $i <= $n; $i++) {
     $nums = explode(" ", readline());
     if(is_numeric($nums[0]) && is_numeric($nums[1])) {
      if($nums[0] > $nums[1]) {
          for($j = 0; $j < strlen($nums[0]); $j++) {
              $sumLeft += $nums[0][$j];
          }
      } else if($nums[1] >= $nums[0]) {
          for($k = 0; $k < strlen($nums[1]); $k++) {
              $sumRight += $nums[1][$k];
          }
      }
      echo $sumLeft + $sumRight . PHP_EOL;
      $sumLeft = 0.0;
      $sumRight = 0.0;
     }
 }

?>